#videoWall {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    .video_box {
        width: 30%;
        height: 500px;
        margin-top: 10px;
    }
    .nourl {
        color: #fff;
        background-color: #000;
        text-align: center;
        line-height: 500px;
    }
}